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Proceedings Paper

Attempting nanolocalization of all-optical switching through nano-holes in an Al-mask
Author(s): M. Savoini; A. H. Reid; T. Wang; C. E. Graves; M. C. Hoffmann; T.-M. Liu; A. Tsukamoto; J. Stöhr; H. A. Dürr; A. Kirilyuk; A. V. Kimel; T. Rasing
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Paper Abstract

We investigate the light-induced magnetization reversal in samples of rare-earth transition metal alloys, where we aim to spatially confine the switched region at the nanoscale, with the help of nano-holes in an Al-mask covering the sample. First of all, an optimum multilayer structure is designed for the optimum absorption of the incident light. Next, using finite difference time domain simulations we investigate light penetration through nano-holes of different diameter. We find that the holes of 200 nm diameter combine an optimum transmittance with a localization better than λ/4. Further, we have manufactured samples with the help of focused ion beam milling of Al-capped TbCoFe layers. Finally, employing magnetization-sensitive X-ray holography techniques, we have investigated the magnetization reversal with extremely high resolution. The results show severe processing effects on the switching characteristics of the magnetic layers.

Paper Details

Date Published: 28 August 2014
PDF: 8 pages
Proc. SPIE 9167, Spintronics VII, 91672C (28 August 2014); doi: 10.1117/12.2061633
Show Author Affiliations
M. Savoini, Radboud Univ. Nijmegen (Netherlands)
A. H. Reid, SLAC National Accelerator Lab. (United States)
T. Wang, SLAC National Accelerator Lab. (United States)
Stanford Univ. (United States)
C. E. Graves, SLAC National Accelerator Lab. (United States)
Stanford Univ. (United States)
M. C. Hoffmann, SLAC National Accelerator Lab. (United States)
T.-M. Liu, SLAC National Accelerator Lab. (United States)
Stanford Univ. (United States)
A. Tsukamoto, Nihon Univ. (Japan)
J. Stöhr, SLAC National Accelerator Lab. (United States)
H. A. Dürr, SLAC National Accelerator Lab. (United States)
A. Kirilyuk, Radboud Univ. Nijmegen (Netherlands)
A. V. Kimel, Radboud Univ. Nijmegen (Netherlands)
T. Rasing, Radboud Univ. Nijmegen (Netherlands)

Published in SPIE Proceedings Vol. 9167:
Spintronics VII
Henri-Jean Drouhin; Jean-Eric Wegrowe; Manijeh Razeghi, Editor(s)

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